Dr. Ohad Birk of Soroka Medical Center in Be’er Sheva has discovered the genetic mutations that cause Progressive Cerebro-Cerebellar Atrophy (PCCA) and its variation PCCA2. A simple blood test can detect both these mutations in prospective parents.
http://www.jns.org/latest-articles/2014/3/8/researcher-discovers-genetic-mutation-in-moroccan-jews-that-leads-to-crippling-disease#.Uxw56M6s9-c